SP-5000M-PMCL / SP-5000C-PMCL
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7.8 PIV (Particle Image Velocimetry)
The Particle Image Velocimetry mode can be used in applications where 2 images need to be
taken with a very short time interval. It can only be used with strobe flash as illumination. The
first accumulation time is 10
sec to 2 sec. Then, the second exposure will be taken. The first
strobe is activated during the first exposure duration and the second strobe is pulsed while the
first frame is being read out. In this way, two strobe flashes generate two video outputs.
Basic settings to use this mode
Trigger Mode = ON
Exposure Mode = Timed
Trigger Option = PIV
Table – 42 Minimum trigger interval (1x8–1Y)
Trigger Mode Readout Mode
Time (Min. Trigger Period)
PIV mode
(Note1)
Full
30.9 ms x 2 + Exposure time + 8.01
µ
s
AOI Center 2/3
21.5 ms x 2 + Exposure time + 8.01
µ
s
AOI Center 1/2
15.5 ms x 2 + Exposure time + 8.01
µ
s
AOI Center 1/4
7.7 ms x 2 + Exposure time + 8.01
µ
s
AOI Center 1/8
3.9 ms x 2 + Exposure time + 8.01
µ
s
V Binning ON (Full)
(Note2)
15.5 ms x 2 + Exposure time + 8.01
µ
s
Note 1
.
Overlap mode=Readout is not available
Note 2
.
SP-5000M-PMCL only
td
te1
te2
itf
tframe1
tframe2
T
Trigegr
Exposure
Exposure
Active
FVAL
DVAL
Time name
Description
Time
td
Exposure beginning delay
5270 clocks
te1
First exposure time period
10µs to 8s
te2
Second exposure time
8.1 ms
itf
Interframing time
10435 clocks
T
FVAL no active
42 LVAL
tframet1
First frame readout
1 frame
tframe2
Second frame readout
1 frame
Fig. 26 PIV mode